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Kit#: QK01
PHOTO ELECTRIC SWITCH :
AC 220V switch for day & night auto electricity controll. We use Triac BT136 instead of relay. When the shade will come on the LDR it switches and your bulb will be ON (which is connected at the output).We tested this kit at 200W bulb & it works fine.
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Kit#: QK05
MAGIC SWITCH :
LDR Switch with timer . When the shade will be on LDR , 12V DC Relay will be ON and when light comes at LDR the Timer starts it work and the Relay still ON and when the Timer complete its time Relay will come back its OFF position. 555 IC is used for timer .Two variable resistors are in the kit, one is for adjusting the light intensity on the LDR and the other one is for the timer. Kit operates with 12V DC.
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Kit#: QK17
BURGLAR ALARM - LIGHT & DARK ALARM :
Light and Dark Alarm for home and offices. We use LDR and Cmos 4011 in this kit . If you want to produce alarm in morning (when sunrise) you should slide the switch at LIGHT position otherwise at DARK. Best kit or beginners. operates at 9 V DC ( power supply not included in kit).
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Kit#: QK22
MAGIC ALARM - THIEF ALARM :
LDR kit with speaker . When the shade will come at the LDR, speaker starts generating sound when the light will come at LDR speaker stops making sound. Speaker supplied with kit (9v power supply not included ).Best kit for beginners and electronic students.
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Kit#: QK37
LIGHT OPERATED RELAY SWITCH (IC 741) :
Light / Dark LDR circuit with a relay on-board.This kit based on IC LM741 op-amp. 12V DC power supply needed.(power supply not included in kit). See our other LDR kits.
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Kit#: QK71
LIGHT OPERATED RELAY SWITCH (Transistor logic) :
This kit is the most basic, practical circuit to build using an LDR to turn on a relay. The two transistors connected as a Darlington pair give the circuit enough sensitivity.
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